What is 0.714285 repeating as a fraction

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line